/Engine/Source/Runtime/Core/Public/Misc/ConfigCacheIni.h
Given an expanded config value, try and produce a collapsed version of it (adding any placeholder tokens).
true if collapsing occurred, false if the collapsed and expanded values are equal.
static bool CollapseValue ( const [FString](API\Runtime\Core\Containers\FString) & InExpandedValue, [FString](API\Runtime\Core\Containers\FString) & OutCollapsedValue )